52 analog 1 mode, 53 analog 2 mode, 54 setting time and date – Rice Lake BCi Belt Scale - Installation & Operation Manual Version 2.00 User Manual
Page 51: 55 interfacing a plc to the belt scale system

BCi
Installation & Operation Manual - Supervisor Mode Parameters
45
4.52 Analog 1 Mode
Three settings are available with this parameter. They
are:
•
Rate - Tracks to the maximum rated
capacity of the belt scale (see Section
4.2).
•
Load - Tracks to the maximum total cell
build of the system (see Section 4.4)
•
Speed - Tracks to the maximum speed
value (see Section 4.36)
4.53 Analog 2 Mode
Three settings are available with this parameter. They
are:
•
Rate - Tracks to the maximum rated
capacity of the belt scale (see Section
4.2).
•
Load - Tracks to the maximum total cell
build of the system (see Section 4.4)
•
Speed - Tracks to the maximum speed
value (see Section 4.36)
4.54 Setting Time and Date
Press the
Time/Date
softkey from the supervisors mode
to access this parameter. The BCi prompts
Enter Date
X X / X X / 2 0 X X M M D D Y Y = >
. Enter in a new date in
MMDDYY format and press
enter
. The integrator then
prompts
Enter Time XX:XX AM/PM HHMM
. Enter in a new
time in 24 hour format and press
enter
.
4.55 Interfacing a PLC to the Belt Scale
System
Within the
BCi
, there are setpoints which contain four
numeric variables:
•
Value (target)
•
Bandwidth
•
Preact
•
Hysteresis
These setpoints can be written and read by a user
program. They can also be read or written from a
PLC. The command for a write value is a 304 and a
read value is a 320. The other write values are 305,
306, and 307 for the hysteresis, bandwidth and preact.
The read values are 321, 322, and 323. You will only
be using the value variables in each setpoint.
The only step in the setpoint menu of the
BCi
is to
enable the setpoints to a Gross (KIND) and they will
be ready to act as “mailboxes”.
The following setpoints will contain these values from
the variable needed in the belt scale:
Setpoint
Value
Description
SP4
Clear totalizer any non-zero value.
SP97
Return belt speed
SP98
Return TN/HR (rate)
SP99
Return load
SP100
Return totalizer value
Table 4-1. Setpoint Values